[0.14.22] LUA: ItemPrototype.limitations always empty

[MatHack]

The property limitations of LuaItemPrototype is always empty (I double checked with the # (length) operator). If I look directly in the files in the base-mod I see that it should be filled for at least the productivity modules (which makes sense).

[Klonan]

The property limitations of LuaItemPrototype is always empty (I double checked with the # (length) operator). If I look directly in the files in the base-mod I see that it should be filled for at least the productivity modules (which makes sense).

Seems to work fine:

Code: Select all

/c for k, limitation in pairs (game.item_prototypes["productivity-module"].limitations) do game.print(k) end

[MatHack]

That works for me as well. Diving deeper into the problem, it seems that the #-operator only works for numeric indices. The array is filled with named indices, which is the reason the command below returns 0. Which also explains why my previous code didn't work, because I used ipairs instead of pairs to loop through this array. Lua is weird sometimes...

Code: Select all

/c game.print(#game.item_prototypes["productivity-module"].limitations)

So... not a bug Thanks for the help Klonan

[Rseding91]

That works for me as well. Diving deeper into the problem, it seems that the #-operator only works for numeric indices. The array is filled with named indices, which is the reason the command below returns 0. Which also explains why my previous code didn't work, because I used ipairs instead of pairs to loop through this array. Lua is weird sometimes...

Code: Select all

/c game.print(#game.item_prototypes["productivity-module"].limitations)

So... not a bug Thanks for the help Klonan

As I've been saying to anyone I meet that uses ipairs: ipairs sucks: don't ever use it. pairs does everything ipairs does except it always works.

[DaveMcW]

ipairs sucks: don't ever use it. pairs does everything ipairs does except it always works.

If it's so bad, why not remove it from the lua engine?